The Simpsons: Hit & Run

Go to the options menu and press and hold F1
Effect How to unlock and what it does
Down down down left When you kick it changes your person(you need to have completed game)
Down down right left Makes the secret car of every level become a lego car
Down down down up Gives you more camera views
right,right,left,left makes you blow up cars in one touch!
right,right,down,left adds a speedometer to the screen.
right,up,right,up makes you invincible!
right,right,right,right speed up to 350 km on any car